		function horizontal() {
		 
		   var navItems = document.getElementById("menu_dropdown").getElementsByTagName("li");
			
		   for (var i=0; i< navItems.length; i++) {
			  if(navItems[i].className == "submenu")
			  {
				 if(navItems[i].getElementsByTagName('ul')[0] != null)
				 {
					navItems[i].onmouseover=function() {this.getElementsByTagName('ul')[0].style.display="block";}
					navItems[i].onmouseout=function() {this.getElementsByTagName('ul')[0].style.display="none";}
				 }
			  }
		   }
		 
		}
		
		$(document).ready(function() {
            horizontal();
        });
